It always pays to know and understand the regulations
https://www.fda.gov/...seventh-edition
On October 10, 2003, the Food and Drug Administration (FDA or we) issued an interim final rule to implement amendments to the Federal Food, Drug, and Cosmetic Act (FD&C Act) made by the Public Health Security and Bioterrorism Preparedness and Response Act of 2002 (Bioterrorism Act) (Pub. L. 107-188) (68 FR 58894). Section 415 of the FD&C Act (21 U.S.C. 350d) requires domestic and foreign facilities that manufacture, process, pack, or hold food for human or animal consumption in the United States to register with FDA. This guidance was developed to answer frequently asked questions relating to the registration requirements of section 415 of the FD&C Act.
If you are the owner, operator, or agent in charge of either a domestic or foreign facility that is engaged in manufacturing/processing, packing, or holding of food for human or animal consumption in the United States, you must register with FDA, unless you are exempt under 21 CFR 1.226 from the requirement to register. If you are an owner, operator, or agent in charge of a domestic facility, you must register your facility whether or not the food from the facility enters interstate commerce (21 CFR 1.225(b)). If you are the owner, operator, or agent in charge of a facility, you may authorize an individual to register your facility on your behalf (see 21 CFR 1.225© and 1.230(a)). A foreign facility’s U.S. agent may, but is not required to, register the facility (21 CFR 1.230).
B. Who is Exempt from Registration? 1. Farms
https://www.fda.gov/.../85043/download